Скачать или смотреть FEP Polymer for cable insluation/cable sheath/

Fluorinated ethylene propylene (FEP) is a copolymer of hexafluoropropylene and tetrafluoroethylene.
Thermally, FEP stands out from PTFE and PFA by having a melting point of 260 °C (500 °F), around 40°C lower than PFA and lower again than PTFE.[5]

Electrically, PTFE, FEP and PFA have identical dielectric constants, but FEP's dielectric strength is only surpassed by PFA. However, while PFA has a similar dissipation factor to PTFE, FEP's dissipation is around six times that of PFA and EFTE (making it a more non-linear conductor of electrostatic fields).[5]

Mechanically, FEP is slightly more flexible than PTFE. Perhaps surprisingly, it does not withstand repetitive folding as well as PTFE. It also features a higher coefficient of dynamic friction, is softer and has a slightly lower tensile strength than PTFE and PFA.[5]

A noteworthy property of FEP is that it is vastly superior to PTFE in some coating applications involving exposure to detergents.
Like PTFE, FEP is mainly used for wiring, e.g. hookup wire, coaxial cable, wiring for computer wires and technical gear.[2] An illustrative end product is for coaxial cables like RG-316.

In manufacturing high-quality composite parts, such as in the aerospace industry, FEP film can be used to protect parts during the curing process. In such applications, the film is called "release film" and is intended to prevent the curing adhesive polymer (e.g. the epoxy in a carbon fibre/epoxy composite laminate) from bonding to the vacuum bagging materials. Being able to maintain chemical composure in extreme temperatures and resist damage from chemical fuels further makes FEP a suitable choice in the industry.[6]

Semi-finished products like pipes,[7] round bars,[7] and sheets[7] for lining containment vessels, gas scrubbers, and tanks are being used in diverse applications in the chemical-processing industry to safely contain and distribute highly-aggressive chemical compounds.